//  代码地址: https://github.com/CoderMJLee/MJRefresh
//  代码地址: http://code4app.com/ios/%E5%BF%AB%E9%80%9F%E9%9B%86%E6%88%90%E4%B8%8B%E6%8B%89%E4%B8%8A%E6%8B%89%E5%88%B7%E6%96%B0/52326ce26803fabc46000000
//  MJRefreshFooter.m
//  MJRefreshExample
//
//  Created by MJ Lee on 15/3/5.
//  Copyright (c) 2015年 小码哥. All rights reserved.
//

#import "MJRefreshFooter.h"

@interface MJRefreshFooter()

@end

@implementation MJRefreshFooter
#pragma mark - 构造方法
+ (instancetype)footerWithRefreshingBlock:(MJRefreshComponentRefreshingBlock)refreshingBlock
{
    MJRefreshFooter *cmp = [[self alloc] init];
    cmp.refreshingBlock = refreshingBlock;
    return cmp;
}
+ (instancetype)footerWithRefreshingTarget:(id)target refreshingAction:(SEL)action
{
    MJRefreshFooter *cmp = [[self alloc] init];
    [cmp setRefreshingTarget:target refreshingAction:action];
    return cmp;
}

#pragma mark - 重写父类的方法
- (void)prepare
{
    [super prepare];
    
    // 设置自己的高度
    self.mj_h = MJRefreshFooterHeight;
    
    // 默认是自动隐藏
    self.automaticallyHidden = YES;
}


- (void)scrollViewContentSizeDidChange:(NSDictionary *)change
{
    [super scrollViewContentSizeDidChange:change];
    
    // change == nil是第一次调用的时候
    if (!self.isAutomaticallyHidden || change == nil) return;
    
    if ([self.scrollView isKindOfClass:[UITableView class]]) {
        UITableView *tableView = (UITableView *)self.scrollView;
        NSInteger count = 0;
        for (NSInteger i = 0; i < tableView.numberOfSections; i++) {
            count += [tableView numberOfRowsInSection:i];
        }
        self.hidden = (count == 0);
    } else if ([self.scrollView isKindOfClass:[UICollectionView class]]) {
        UICollectionView *collectionView = (UICollectionView *)self.scrollView;
        NSInteger count = 0;
        for (NSInteger i = 0; i < collectionView.numberOfSections; i++) {
            count += [collectionView numberOfItemsInSection:i];
        }
        self.hidden = (count == 0);
    }
}

- (void)setAutomaticallyHidden:(BOOL)automaticallyHidden
{
    _automaticallyHidden = automaticallyHidden;
}

#pragma mark - 公共方法
- (void)noticeNoMoreData
{
    self.state = MJRefreshStateNoMoreData;
}

- (void)resetNoMoreData
{
    self.state = MJRefreshStateIdle;
}
@end
